^^ It certainly isn't going to continue on some arbitrary reason made up by random fanbois/bootlickers on forums...
People don't think logically or real-world around here. Blizz doesn't give a rat's ass about you or me or their customers, except to the extent they can be further plucked for profit. Classic servers and all the rest bear that out if you look at how it profits them as a corporation.
As the poster above said, if they spend less on litigation to combat private servers, then having official Classic is what they'll do. It's the same way they look at "banwaves" when the truth is they've looked the other way on various types of cheating & exploiting for years - until and unless it starts to hurt their profits.